Comparison

ImpressionApp vs GrowPAR

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ImpressionApp

Effortlessly manage smart lighting systems with intuitive controls for on/off and brightness. Seamlessly integrate lights by scanning QR codes and access internal services through a streamlined interface.

Highlights
  • Smart lighting management
  • QR code light integration
  • On/Off light control
  • Brightness adjustment
  • Smart dimming technology
  • Internal service access
Features
Read full description

Introducing the Impression App, an all-encompassing app designed to streamline the management of smart lighting systems and access to internal services. At its core, the app simplifies the setup process by allowing users to effortlessly scan QR codes associated with their lights, seamlessly integrating them into the system. The primary focus lies in Lighting Control, offering users an intuitive interface to turn lights on or off and adjust brightness levels with a single tap. The app goes beyond basic controls, featuring smart dimming technology for precise illumination adjustments to suit any ambiance. Illuminate your space with ease and navigate your way to our internal services – download the Impression App today!

About

GrowPAR

Features
Read full description

GrowPAR turns your iPhone into a professional-grade PAR light meter for indoor growing, hydroponics, and plant research. What is PAR? Photosynthetically Active Radiation (PAR) measures the light your plants actually use for photosynthesis — between 400–700nm. Unlike lux meters, GrowPAR measures what matters most to your plants. KEY MEASUREMENTS - PPFD (μmol/m²/s) — Instant photon flux density - DLI (mol/m²/day) — Daily Light Integral for growth optimization - CCT (Kelvin) — Color temperature of your light source - Lux — Illuminance measurement PLANT INTELLIGENCE GrowPAR includes a database of 36+ plants with scientifically accurate targets: - Stage-based PPFD targets: Seedling → Vegetative → Flowering → Harvest - Ideal temperature (day/night), humidity, and CO₂ levels - Hydroponics parameters: pH range and EC values - LED distance and photoperiod recommendations - Real-time sufficiency indicator: Is your light enough? LIGHT SOURCES Calibrated for all grow light types: - Full Spectrum LED • Red/Blue LED • HPS • CMH • Natural Sunlight MEASUREMENTS & HISTORY - Save unlimited measurements with timestamp - Filter by plant and light source - Export to CSV for analysis CALIBRATION Use with Apogee MQ-500 or similar quantum sensor for research-grade accuracy. 11 LANGUAGES English · German · Spanish · Turkish · French · Italian · Portuguese · Russian · Japanese · Chinese · Arabic Whether you're growing tomatoes, microgreens, or orchids — GrowPAR gives you the data to grow smarter. Privacy Policy: https://hfozturka.github.io/growpar/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ImpressionApp4 screens
GrowPAR4 screens

Verdict

The call

The clearest difference is update cadence: GrowPAR at every 4 days against ImpressionApp's every 5 weeks. ImpressionApp's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ImpressionApp ships an update every 5 weeks, GrowPAR every 4 days. Both last shipped on October 1, 2026.

Scorecard2 real differences · 6 level
ImpressionApp versus GrowPAR: the parameters behind the verdict, then further details
ParameterImpressionAppGrowPAR
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 5 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size25 MB11 MB
Age rating4+4+
DeveloperNubiaville LimitedHalil Fatih Ozturk

In-app purchases

None

ImpressionApp

No in-app purchases

None

GrowPAR

No in-app purchases

Questions

Is ImpressionApp free?
ImpressionApp is free to download, with no in-app purchases.
Is GrowPAR free?
GrowPAR is free to download, with no in-app purchases.
Do ImpressionApp or GrowPAR have ads?
Neither ImpressionApp nor GrowPAR shows ads.
Which is updated more often, ImpressionApp or GrowPAR?
ImpressionApp ships an update every 5 weeks, and GrowPAR every 4 days. Most recently, ImpressionApp was updated on October 1, 2026 and GrowPAR on October 1, 2026.

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